Final answer:
A zygote is the cell produced by the fusion of two gametes in sexual reproduction.
Step-by-step explanation:
In sexual reproduction, when two gametes fuse, a new cell called a zygote is formed. Therefore, the correct term for a cell produced by the fusion of two gametes is zygote.
The zygote is a diploid cell with two sets of chromosomes, one from each parent, and it will undergo multiple rounds of mitosis to develop into a multicellular offspring.